PDF display will be abnormal when scaling the window, as shown in the video

[Shompinice]

PDF 在缩放窗口时显示会出现异常，如视频所示

Attachment: Video_20250602_193051_74a7e29e.zip

[Bharathi Selvam]

Hi Shompinice,

Thank you for reaching out to Syncfusion support.

We have reviewed the video you provided, but we are unclear about the exact issue you are experiencing. Are you referring to the PDF resizing to fit the window when it is adjusted, resulting in an abnormal display? If not, could you please clarify the specific problem you are facing? Your detailed response will help us assist you more effectively.

Regards,
Bharathi S

[Shompinice]

yes, you are right

[Bharathi Selvam]

Hi Shompinice,

Thank you for the update.

In the UWP PDF Viewer, the current behavior is that PDF pages automatically resize to fit the window when it is adjusted. Could you please confirm if your expectation is for the PDF pages not to resize to fit the window when it is resized?

Your confirmation will help us better understand your requirement and assist you more effectively.

Regards,
Bharathi S

[Russia Rita]

@GeoGuessr

the PDF viewer does not correctly adapt to window scaling, which leads to abnormal visual behavior. The system likely needs improvements in resize event handling,  responsive layout design, or dynamic re-rendering of the PDF content to ensure that the document displays correctly regardless of window size.

[Bharathi Selvam]

Hi Russia Rita,

Thank you for the clarification. We were able to replicate the issue “PDF Viewer does not adjust scaling correctly when resizing the window in the UWP.” We are currently analyzing the behavior and will provide you with more details once our validation is complete.

Regards,

Bharathi S

[ManojKumar Arumugasamy]

Hi Russia Rita,

To ensure correct window‑scaling visual behavior within the PDF viewer, please apply the recommended workaround by setting the MinimumZoomPercentage parameter to 1. This configuration helps maintain consistent rendering and prevents scaling irregularities during window resizing.

Code C#:
pdfViewer.MinimumZoomPercentage=1;

Regards,

Manoj